DSP

FFTW?
Hello, can anyone explain me how to perform the convolution of two dimentional array with fftw? Thanks ... 22 Dec 2006 03:47

memory f2812
Hi all, i have a problem for building a program , error message is following line : error: can't allocate .rtdx_text, size 0000028b (page 0) in PROG (avail: 000001da) what can be problem for this message ? best regards . ... 9 Dec 2006 11:45

FIR Cookbook?
Has anyone come up with a "cookbook" for simple FIR filters similar to RBJ's IIR cookbook? I am looking for audio filters (i.e., mild rolloff, fast compute) using relatively short FIRs (50 coeffs max). Reason for FIR is that I need linear phase. Reason for cookbook is that I need to calculate the coefficients... 14 Dec 2006 16:55

TMS320F2812 Running application from Flash
I am using the TMS320F2812 , DSP and when i run my program from the RAM it works well , however when i try to port it in the Flash it runs out of space as .text is referenced to FLASH A in the F2812.cmd file (as attached).The error is as mentioned in the compilation report.txt file.My error report excerpt ========... 22 Nov 2006 09:05

TI BIOS/CSL for 64xx/64x+ devices
Greetings, I am seeking general ideas/opinions/guidance on software development for TI DSP devices, in particular, the newer fixed point devices such as 6455. I do both algorithm development and implementation work. Most of my implementation work has been on simpler devices such as 5600, 96002, Sharc and 5510... 16 Nov 2006 23:59

Matlab multipath simulator
I'd appreciate pointers to Matlab code that models and simulates various multipath environments. -- % Randy Yates % "My Shangri-la has gone away, fading like %% Fuquay-Varina, NC % the Beatles on 'Hey Jude'" %%% 919-577-9882 % %%%% <yates(a)ieee.org> % 'Sh... 24 Oct 2006 08:03

DSPs for guitar effects
Hello, I'm looking for best DSPs for guitar effects, especially delay/reverb (1-2s or even more delay). I can use C55x but I think that it could be too expensive. Maybe some dedicated DSPs with built-in algorithms could be better? I found: 1) Cirrus CS4811 but it's EOL 2) Alesis AL3201 but I get only 0,8s delay ... 20 Oct 2006 14:33

Using FFTW 3 DLL w/ CLR
(This post regards compiling and linking to the FFTW library on Windows. Apologies if this is off-topic here.) I'm attempting to link an application to the FFTW .lib and .dll. I can build and run a raw c++ sample application perfectly, as follows: // testapp.cpp #include "fftw3.h" int main() { const uns... 5 Oct 2006 14:53

Fast integer distance formula
I have an approximation for the Pythagorean distance formula (magnitude of vector [x,y]) using integer arithmetic that I would like to improve. Currently I am using this: if(x<0) x=-x; if(y<0) y=-y; if(x < y) { int t = x; x = y; y = t; // ensures that x >= y } z = (y < ((13107 * x)>>15)) ? ... 7 Oct 2006 09:19

Timing Recovery for Blind Demodulation
Hi! I'm working on a simulation of blind QAM demodulation in Matlab. So far i have implemented AGC, Carrier Phase tracking loop and a CMA equalizer - but i have not yet implemented symbol timing recovery. I have seen numerous references to Band-Edge Timiing Recovery (BETR), wich seem to do the trick quite well... 9 Oct 2006 17:11